[etherpad-web] etherpad: Specify docker registry to pull

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 94eddad1eb48e1846d0d4dfa60028b7c08062d6b
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed May 13 19:14:33 2020 +0200

    etherpad: Specify docker registry to pull

 etherpad/Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/etherpad/Dockerfile b/etherpad/Dockerfile
index e2d59ce..973db93 100644
--- a/etherpad/Dockerfile
+++ b/etherpad/Dockerfile
@@ -1,4 +1,4 @@
-FROM etherpad/etherpad:1.8.2
+FROM docker.io/etherpad/etherpad:1.8.2
 
 USER root
 RUN apt-get update && apt-get install --no-install-recommends -y libreoffice-common